Terry, Thanks for the reply! You asked: Q: Do you have nodebus extenders in Node 05 or in Node 06? =20 A: I have no nodebus extenders in node 05, but am using NCNIs in node 06. Q: Have you performed nodebus cable tests in SMDH while the "island" exists? A: I have performed a nodebus cable test while islanded, but to no avail. Q: Check all node cable connectors to ensure that they did not vibrate loose. A: I will go over the cabling this afternoon as you suggest. Q: Did this site work great for a while and just start giving you a problem or has it always been a problem? A: This has been a problem for quite a while. Oddly enough a reboot of the AW seems to make it go away, and stay a way for a few weeks to months. Moreover, we keep replacing copper with fiber in the CBLAN, and the network reliability seems improved. Thanks very much for the reply, hope my answers help clarify the issue. Dave _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave